2021 Freightliner Cascadia Technical Service Bulletins

509 technical service bulletins (TSBs) are on record for the 2021 Freightliner Cascadia. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10209296Mar 2, 2022Engine cooling. Revised Freightliner Service Bulletin for ParkSmart Eberspaecher Auxiliary Heater Service. This bulletin replaces the version dated May 2015. The note in General Information has been revised to include New Cascadia. Espar information has been changed to reflect a company name change to Eberspaecher.
• 10208395Feb 26, 2022Brakes. Revised Field Service Campaign for Cascadia, 49X ABS MBSP+ Controller Software Update
• 10208394Feb 26, 2022Brakes. Important Campaign Information letter for SF622 – Addition of 8x4 Vehicles to Populationx
• 10208390Feb 21, 2022Electrical system. Freightliner Service Bulletin for Battery Load Disconnect Switch Installation. Cab load disconnect switches (CLDS), also known as positive load disconnect, installed on selected vehicles can reduce battery drain when the vehicle is not operational.
• 10208377Feb 16, 2022Engine cooling. Revised Detroit Field Service Campaign for Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits.
• 10208389Feb 15, 2022Engine cooling. Freightliner Service Bulletin for DEF Connector Reinforcement Caps.
• 10208384Feb 15, 2022Equipment. Freightliner Parts Technical Bulletin for Discontinued Radio Replacement.
• 10208388Feb 4, 2022Suspension. Freightliner Service Bulletin for Front Spring Eye Bushing Replacement
• 10207541Jan 31, 2022Visibility (wipers, defrost, mirrors). Main Mirror Arm Covers Loose - Falling Off. Lower arm covers designs have clips that hold the cover on but over time the clips can fail and allow the covers to become loose or fall off.
• 10207350Jan 26, 2022Transmission and drivetrain. Cascadia with Allison Transmission - Inconsistent Shift. On certain Freightliner Cascadia vehicles with Allison automatic transmissions, a software error may prevent the transmission from shifting out of neutral.
• 10207303Jan 26, 2022Engine cooling. Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits. Specific 2021 Freightliner New Cascadia model vehicles, powered with DETROIT Gen 5 DD15 Engines manufactured February 3, 2020, through December 14, 2020
• 10207310Jan 21, 2022Transmission and drivetrain. Meritor Rear Axle Temperature Parameters On Cascadia vehicles equipped with Meritor drive axles, the high temperature warning parameter is set too low for some applications, for vehicles equipped with synthetic oil, and for certain conditions that are not harmful to the axle.
• 10207363Jan 3, 2022Body and structure. Revised Freightliner Service Bulletin for Retrofit of One-Piece to Two-Piece Auxiliary Dash Panel. Minor note: added an update of document previously submitted. The related VMRS codes are added
• 10205881Dec 7, 2021Transmission and drivetrain. DT12 Transmission Control Harness Chafing the Transmission Control Module. Classic and New Cascadia vehicles equipped with DT12 transmissions, built from approximately January 2017 to mid-March 2021, may experience rubbing/chafing on the chassis harness near the transmission.
• 10203755Nov 23, 2021Suspension. Service Solution for Aero Height Control Interfering with RDF Alignment. The Aerodynamic Height Control feature on the New Cascadia is a feature that raises and lowers the air suspension with relation to vehicle speed in order to reduce drag and achieve better fuel efficiency. The Hadley Smart Valve (HSV) is the module that makes this possible by applying and exhausting air from the rear axle suspension as necessary.
• 10203754Nov 23, 2021Visibility (wipers, defrost, mirrors). Updated Service Solution for Main Mirror Arm Covers Loose -Falling Off. Lower arm covers designs have clips that hold the cover on but over time the clips can fail and allow the covers to become loose or fall off.
• 10203750Nov 15, 2021Lane departure. Field Service Campaign for Cascadia Lane Assist Software. Certain vehicles may experience the loss of Active Lane Assist (ALA) while driving due to decreased sensitivity of the steering wheel, with no visible indicator to the operator. ALA is an accessory system and the driver controlled steering function including power steering is not affected.
• 10203749Nov 15, 2021Lane departure. Important Campaign Information letter for SF630 – Revised and Reactivated Bulletin. This letter is to inform you that campaign SF630, Cascadia Lane Assist Software, will be reactivated with revised work instructions Monday, 11/15/21. Please print and use the revised bulletins for all work under SF630 from this point forward.
• 10202729Oct 22, 2021Lane departure. SF630 Campaign Suspended. This letter is to inform you that campaign SF630, Cascadia Lane Assist Software, will be suspended today Friday, 10/22/21. On 10/22/21 you will see SF630 marked as 'Suspended' in OWL. It has been determined that a change in the procedure is necessary. A second Important Campaign Information letter will be posted when the changes have been made and the campaign is reactivated.
• 10202734Oct 14, 2021Electrical system, Equipment. Stoneridge ICUC Replacement. Certain vehicles equipped with a Stoneridge instrument control unit common (ICUC) were programmed using a new method to improve efficiency and align with programming for European ICUCs. All ICUCs built using the new method are permanently in the "read only" mode, and any attempt to flash will corrupt the ICUC memory.
• 10202736Oct 13, 2021Lane departure. Cascadia Lane Assist Software. Certain vehicles may experience the loss of Active Lane Assist (ALA) while driving due to decreased sensitivity of the steering wheel, with no visible indicator to the operator. ALA is an accessory system and the driver controlled steering function including power steering is not affected.
• 10202733Oct 1, 2021Brakes. ConMet Front Hub to Rotor Fasteners. On certain vehicles, the front rotor nuts may not be torqued to manufacturer specification. Loose components could cause damage to the ABS tone rings, the ABS sensors, and the anchor plate mounting fasteners.
• 10201684Sep 15, 2021Lane departure. Service Solution for Damaged SGA Wires at GrabHandle Located on Right A Pillar. The field had reported failed VRDU modules related to wires damage for the SGA.
• 10201999Sep 13, 2021Equipment. DetroitConnect follow-up customer communication for certain vehicles unable to complete over the air updates including parameters and DDEC over the air.
• 10201989Sep 13, 2021Equipment. My Communication for Detroit Connect Over the Air Issue Update. This is an update for the previously communicated Over the Air functionality issue on CTP1s. We are currently testing a solution for the issue that is affecting these CTP1 telematics devices. While testing is not complete initial results are promising. The solution will require a soft ware update which is currently planned for October/November.
• 10200700Aug 30, 2021Forward collision avoidance, Transmission and drivetrain, Electrical system. Field Service Campaign for Cascadia ICUC Traffic Sign Display. Certain vehicles equipped with a Detroit Assurance base package, and a DT12 transmission with intelligent powertrain management (IPM+), were not built with the Traffic Sign Display (TSD) option.
• 10200606Aug 25, 2021Electrical system. Customer Advisory Letter for New Cascadia Aluminum Battery Cable Replacement. This customer advisory letter is intended to provide parts for inspection by DTNA Engineering to finalize a technical solution for an upcoming recall: FL893/NHTSA 21V-481.
• 10200611Aug 24, 2021Brakes. Revised Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. REVISION: The work instructions have been revised. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
• 10200610Aug 24, 2021Brakes. Important Campaign Information Letter for SF622 – Campaign Revision/Reactivation. This letter is to inform you that the work instructions for Field Service Campaign SF622, Cascadia/49X ABS MBSP+ Controller Software Update have been revised.
• 10200649Aug 23, 2021Engine cooling. Detroit Field Service Campaign for Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits. Certain Customer Demo Unit (CDU) and Pre-Series vehicles with Gen 5 engines require engine retrofits to bring the engines up to full production specifications.
• 10200638Aug 23, 2021Engine cooling. Technical Service Letter for Detroit CPC501T GHG21 Only; Updating Bootloader Using DL version 8.14 and higher. On Detroit powertrain equipped Cascadia’s, built in 2020, it may be necessary to complete an additional step in the programming process when updating the CPC501T software.
• 10200615Aug 19, 2021Equipment. Service Solution for Cummins PTO functionality error software level 81Z-006. Cascadia/Western Star 49X with Cummins engines combined with software level 81Z-006. A programming bug in the central gateway (CGW) for software level 81Z-006 will not allow completion of the preset #2 PTO engine speed.
• 10200621Aug 18, 2021Transmission and drivetrain. Freightliner Service Bulletin for Detroit New Final Drive (NFD) Rear Axle Temperature Parameters. Some New Cascadia trucks equipped with Detroit Diesel New Final Drive (NFD) axles have a high temperature warning parameter. The warning is set too low for some applications, and under certain conditions that are not harmful to the axle, the high temperature warning will appear on the dash and indicate an error…
• 10200709Aug 10, 2021Forward collision avoidance. Service Solution for Detroit Assurance Radar Front End Shipping Label. It has been reported that in some cases shipping labels may have been affixed to the inside center of the front cover on aftermarket parts. The shipping label has since been moved to the outer edge of the front cover, which should not affect the RDF's ability to properly sense obstacles located in front of the vehicle.
• 10200706Aug 10, 2021Equipment. Freightliner Action Bulletin for Cascadia Sleeper Cabinet Options. Improved cabinet options in sleeper models to increase storage and customize to the driver’s liking.
• 10200568Aug 4, 2021Fuel system. Revised Customer Advisory Letter for Correction of Low Pressure Fuel Line Installation to Ensure Proper Clearance. Revision Information: Figures have been updated to better show the issue being addressed.
• 10200623Jul 22, 2021Visibility (wipers, defrost, mirrors). Freightliner Service Bulletin for Rain Sensor not Detecting Material on the Windshield. The rain light sensor (RLS) requires proper mounting and clear windshield visibility for auto wipe to function properly. It is always recommended when checking for proper operation of the RLS, that the sensor be properly fastened to its mounting bracket and that the gel is free of fingerprints and foreign material. Also ensure…
• 10199374Jul 16, 2021Forward collision avoidance. Training Solutions for Detroit Assurance Frontend Radar (RDF) General Troubleshooting Approach. This solution acts as an overall guide for troubleshooting Frontend Radar (RDF), Adaptive Cruise Control (ACC), and Active Brake Assist (ABA) issues. The troubleshooting approach below is an all-encompassing approach to address most of the relevant complaints related to the RDF. Some of it may be redundant for the…
• 10199373Jul 16, 2021Suspension. Service Solution for Aero Height Control Interfering with RDF Alignment and 42/523004/13 and 232/524042/9 Active for vehicles equipped with Hadley Smart Valve. The Aerodynamic Height Control feature on the New Cascadia is a feature that raises and lowers the air suspension with relation to vehicle speed in order to reduce drag and achieve better fuel efficiency.
• 10199372Jul 16, 2021Fuel system. Service Solution for New Cascadia Fuel Sending Unit Connector Loose.
• 10199363Jul 15, 2021Seats. Customer Advisory Letter for Replacement of Sears Driver Seat Metal Mounting Clip to Eliminate Seat Sensor Chaffing Issue. The seat sensor harness on New Cascadia vehicles ordered with a Sears driver seat (sales code 756-1H2) may experience chaffing due to the incorrect mounting of a metal clip edge;
• 10199371Jul 14, 2021Forward collision avoidance, Lane departure. Service Solution for VRDU Fault Code 232/524000/19and 232/524049/19 – ECU CPC Data Error. This VRDU code typically sets after the VRDU gets reprogrammed and parameters to clear out. To prevent this from happening in the future, follow the programming guide laid out in SB 54-308.Parameter changes during flashing can occur if the programming steps are not followed.
• 10198596Jun 22, 2021Brakes. Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
• 10198287Jun 18, 2021Electrical system. Freightliner Service Solution for New Cascadia No Start and or Stalk Switch Shift Lever Right Active Fault(s). The solution applies to New Cascadia vehicles built from 1/1/2020 with Detroit Engines and DT12 transmissions.
• 10198285Jun 16, 2021Wheels. Customer Advisory Letter for 4-Hook Chain Hanger Replacement.
• 10194873May 13, 2021Electrical system, Vehicle speed control. Tech Talk Discussion Powertrain Overspeed Detected
• 10194477May 12, 2021Equipment, Brakes. Customer Advisory Letter for Drive Axle Drum Brake S-Cam U-Bolt Replacement.
• 10194871May 10, 2021Brakes, Electrical system. Tech Talk Discussion 2021 P4 jyst brakes drag alarm on all the time
• 10199391May 1, 2021Suspension. Freightliner Action Bulletin FAB286 Cascadia Rear Suspension Ride Height
• 10200624Apr 27, 2021Visibility (wipers, defrost, mirrors). Freightliner Service Bulletin for Auxiliary Mirror Vibration. Cascadia trucks built from January 1, 2017 through June 16, 2020 may be equipped with auxiliary mirrors that vibrate or wobble. A service kit (part number 22-77791-500) is available to resolve the issue.

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